Maybe just go door to door to the areas you think could have been invovled. You might just get something in sight when they open their door. Tell them you are just asking for some sugar, or you need to make a phone call... try to think of something that many wouldn't mind letting you inside for just a second.
If they seem really nervious or shaky, you can add them to a list of maybes....
Don't know what else you can do really besides that.
It was most likley someone near you though.

Where in the UK are you? Luckily I live in a good neighbourhood where I can leave my back door open with one of those security chains (so the kitties have access in and out) and go out shopping or whatever.

Do people actaully go to their neighbours to borrow sugar? You would get stabbed or shot where im from if you asked for the time let alone sugar

Im not pursuing it thats what i pay taxes for, let the police do their job (lilke they ever will!) just gonna learn from my mistake and get back on my feet and come back stronger and more paranoid of the world and people around me